#
# Topic: Ansible lookups組件
# State:
# 1. 通過lookups組件，Ansible可以從其他地方拉取數(shù)據(jù)
# 2
# Testing environment:
# OS: RHEL6.6
# Python: python2.7.5
# Ansible: ansible 2.3.1.0
# Nodes: 3
#

• 1. lookups file:
  • 原理:
    利用python codecs.open模塊打開一個(gè)文件并返回文件內(nèi)容
  • 用法:
    可以將返回的結(jié)果放在一個(gè)變量中，然后使用python的字符串處理方法進(jìn)行處理
  • 示例:

# lookups file

• name: lookups file
  remote_user: root
  hosts: tomcat
  gather_facts: no
  tasks:

  • name: lookups file
    vars:
    user: "{{ lookup('file', '/etc/ansible/looksup/looks.yml') }}"
    debug: msg="{% for i in user.split("\n") %}{{i}}{% endfor %}"
• 2. lookups password:
  • 原理:
    對獲取的內(nèi)容進(jìn)行加密處理
  • 用法:
    lookup('password', 'file_path')
  • 示例:

# lookups file

• name: lookups file
  remote_user: root
  hosts: tomcat
  gather_facts: no
  tasks:

  • name: lookups file
    vars:
    user: "{{ lookup('password', '/etc/ansible/looksup/looks.yml') }}"
    debug: msg="{{user}}"
• 3. lookups pipe:
  • 原理:
    相當(dāng)于linux中的管道的作用， 將一個(gè)命令輸出結(jié)果返回
  • 用法:
    lookup('pipe', 'command')
  • 示例:

• hosts: tomcat
  gather_facts: no
  tasks:

  • name: the first task
    vars:
    content: "{{ lookup('pipe', 'date +%y-%m-%d') }}"
    debug: msg="{% for i in content.split("\n") %} {{ i }} {% endfor %}"
• 4. lookups redis_kv:

  • 原理:
    鏈接redis數(shù)據(jù)庫， 從redis中獲取數(shù)據(jù)

  • 用法:

  • 示例:

• 5. lookups template:

  • 原理:
    先渲染jinja2模板之后再讀取文件內(nèi)容

  • 用法:

  • 示例:

• hosts: tomcat
  remote_user: root
  tasks:
  • name: first
    vars:
    content: "{{lookup('template', './tmp.j2')}}"
    debug: msg="{% for i in content.split("\n") %} {{i}} {% endfor %}"